The shopping center - which is about the size of 30 football pitches - has been visited by a number of celebrities since opening in 2008, including Justin Bieber, Mariah Carey, Beyoncé, Jake Gyllenhaal and Lady Gaga.

Payne said of the milestone: "We are obviously ecstatic and incredibly humbled... We have an incredible team of people around us who have helped us achieve this, and above all we would like to thank our fans. We owe all our success to them."